8730775521 has 24 divisors (see below), whose sum is σ = 13584753000. Its totient is φ = 5371382016.

The previous prime is 8730775511. The next prime is 8730775567. The reversal of 8730775521 is 1255770378.

It can be written as a sum of positive squares in 4 ways, for example, as 2130837921 + 6599937600 = 46161^2 + 81240^2 .

It is not a de Polignac number, because 8730775521 - 2²¹ = 8728678369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8730775511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 605605 + ... + 619853.

It is an arithmetic number, because the mean of its divisors is an integer number (566031375).

Almost surely, 2^8730775521 is an apocalyptic number.

It is an amenable number.

8730775521 is a deficient number, since it is larger than the sum of its proper divisors (4853977479).

8730775521 is a wasteful number, since it uses less digits than its factorization.

8730775521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19505 (or 19502 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The square root of 8730775521 is about 93438.6190019951. The cubic root of 8730775521 is about 2059.1324087942.

The spelling of 8730775521 in words is "eight billion, seven hundred thirty million, seven hundred seventy-five thousand, five hundred twenty-one".